<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>

   <!-- 卡片视图区域 -->
   <el-card>
    <!-- 2. 为 ECharts 准备一个具备大小（宽高）的 DOM -->
    <div id="main" style="width: 750px;height:400px;"></div>
   </el-card>
  </div>
</template>


<script>
import * as echarts from 'echarts'
import _ from 'lodash'

export default {
  data() {
    return {
      //需要合并的数据
     options: {
        title: {
          text: '用户来源'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3'
            }
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: 'value'
          }
        ]
      } 
    }
  },
  created() {
    
  },
  //此时,页面上的元素,已经被渲染完毕了
  async mounted() {
     // 3. 基于准备好的dom，初始化echarts实例
        var myChart = echarts.init(document.getElementById('main'));

   const {data:res} = await this.$http.get(`reports/type/1`)

   if(res.meta.status!==200){
     return this.$message.error(`获取折线图数据失败! `)
   }
    // 4. 准备数据和配置项
    const result = _.merge(res.data,this.options)


    // 5. 展示数据
     myChart.setOption(result);
  },
  methods: {
    
  },
}
</script>

<style lang="less" scoped>

</style>